DaVita Competency Evaluation/Assessment Practice Exam Prep & Study Guide

The more positive arterial pressure during dialysis can be influenced significantly by the separation of the blood tubing from the arterial access. When the blood tubing is improperly positioned or disconnected from the arterial access, it can lead to a situation where the pressure within the system is disrupted. This disruption results in a rise in positive pressure readings in the arterial line, as the dialyzer and heart are working against each other, rather than allowing the blood to flow smoothly from the patient.

The proper alignment of needles is essential for effective dialysis but does not specifically cause a more positive arterial pressure. Increased blood flow rates typically lead to a decrease in arterial pressure due to the dynamics of blood flow and resistance in the system. Similarly, effective removal of air bubbles is critical for preventing complications but is unlikely to directly create a more positive arterial pressure in the system. Thus, the separation of the blood tubing from the arterial access directly affects pressure readings in a way that can result in a more positive arterial pressure during the dialysis process.